Trip mechanism for grain-binders



(No Model.) 3 Shee'ts--Sheet 1.

B; F. STEWART.

TRIP MECHANISM FOR GRAIN BINDERS.

No. 573,048. Patented 6. 15, 1896 l up; I I 1 m I. 1: wulnlrriil- H i5(No Model.) V 3 Sheets-Sheet 2.

B. F. STEWART.

TRIP MECHANISM FOR GRAIN BINDERS.

No. 573,048. Patented D60. 15, 1896.

I fizz/Praia)" nfraeases A (No Model.) 3.Sheets-Sheet 3;

B. r. STEWART.

TRIP MECHANISM FOR GRAIN BINDERS.

Patented Dec. 15, 1896.

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Wfweasea //,,6m4j/ UNITED STATES BENJAMIN F. STEIVART,

PATENT OFFICE.

OF CHICAGO, ILLINOIS.

TRIP MECHANISM FOR GRAIN-BINDERS.

SPECIFICATION forming part of Letters Patent No. 573,048, dated December15, 1896 Application filed April 22, 1896. $erial No. 588,686. (Nomodel.)

To all whom it may concern:

Be it known that I, BENJAMIN F. STEWART, a citizen of the United States,residing at Chicage, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Trip Mechanism forGrain- Binders; and I do declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same, referencebeing had to the accompanying drawings, and to the letters of referencemarkedthereon, which form apart of this specification.

The invention relates to that class of harvesting-machines in which anautomatic binding mechanism is employed, the action of which iscontrolled by a trip-arm which yieldingly receives the pressure of theforming gavel and by the movement of which under such pressure thedisengaging-arm of a sprin gactuated clutch is released to throw thebinding mechanism into engagement with a drive shaft.

The invention consists in certain hereinafter-described improvements inthe trip-arm for engaging the clutch.

I have illustrated in the drawings only such parts of the machine as Ideem necessary to show the connection and action of the parts improvedupon. a I

Figure 1 is a plan view of that portion of the binder mechanism which isbelow the deck, some portions being broken away. Fig. 2 is a sectionalview on the line 2 2 of Fig. 1. Fig. 3 is a sectional view on the line 3of Fig. 1. Fig. 4. is a plan section 011 the line 4: 4 of Fig. 3. Fig. 5is a detail elevation, partly in section, as seen from the line 22 ofFig. 1 with some of the parts removed. Fig. 6 is a side elevation of thetrip-stop, and Fig. 7 is a plan view of the same.

In the drawings I show the packer-shaft at A, the deck at B, the packersat C, the trip-arm for receiving the pressure of the forming gavel at D,and the rock-shaft for carrying the trip-arm at cl, the trip-arm beingpivotally attached to a crank-arm (1, fixed upon the shaft (Z. Thecam-wheel-for controlling the movement of the trip-arm D is indicated atE, the cam-flange c of this wheel being adapted to carry the crank-armF, mounted upon the shaft (Z and provided with an antifrictional rollerf for bearing upon the flange 6. The wheel E has an internal gear, whichmeshes with a pinion a carried by a sleeve a, mounted upon the end a ofthe packer-shaft A. a

At U is shown the U-frame, which carries the binder mechanism, and at ua bracket of such frame, which carries the journal-block, within whichthe shaft end a and sleeve c are mounted. The bar it is a part of theframe of the machine and supports the deck B.

All of the parts above referred to are of known. construction, and Ihave not, therefore, deemed it necessary to enter into a detaileddescription of them in this application.

The sleeve a carries at the end removed from the pinion a a plate L. Aclutch-block M is mounted upon the shaft A in proximity to the plate L,and a spring-controlled pawl j is pivotally attached to the plate L andcarries a lateral stud 7' upon which is mounted an antifrictional rollerfor engaging the clutch-block M. The pawl j is thrown into engagementwith the clutch-block M by the action of aspiral spring 0, mounted upona thrust-bar 0 sliding in an aperture in a lug O, projecting from theface of the plate L and bearing against an arm j, projecting backwardlyfrom the pawl 7' the spring 0 reacting between a shoulder upon the bar 0and the lug O.

The clutch-block H is in disk form and is provided with twooppositely-disposed concaved shoulders for receiving the roller upon thestud j the rearward sides of such shoulders being inclined or rounded,so that the reverse movement of the clutch-block is not impeded by thepawl, which freely rides over the rounded portion of the shoulders. Anarm J projects laterally from the base of the pawl and carries on itsouter end a lateral study.

The shafts A (Z are parallel, and upon the latter is mounted a trip-stopH, comprising an arm with a lateral stud h at its outer end, the normalposition of which, while the gavel is being formed, is directly in thepath of the stud j, so that, as the latter revolves about the shaft A,it is intercepted by the stud h and retarded in its movement, therebycompressing the spring 0 and throwing the pawl out of engagement withthe clutch-block M. As the gavel grows in size it forces back thetrip-arm D, and thereby elevates the tripstop II and dise'ngages itsstud h from the stud j, allowing the pawl j to be again thrown intoengagement with the clutch-block M by the action of the spring 0. Thestud j is caught by the inner face of the stud h, which is oblique tothe longitudinal direction of the trip-stop H, so as to liesubstantially radially across the orbit of the studj. In order to effectthe certain and easy disengagement of these parts under the action ofthe trip-arm D, it is necessary that their adjustment be very delicate,so that a slight movement of the arm II frees the pawl. hen the relativeadjustment of the studs 7i is dependent, as it has been in the past,upon the construction of so many parts of the machine, it will be seenthat the slightest inaccuracies in the location of the journals of theshafts A d, as well as any slight inaccuracies in the casting of the armH and the pawl and its accessories, will prevent the delicacy ofengagement of the parts h j,which is essential to the proper action ofthe mechanism. Another source of difliculty arises from the wear of thecontact-faces of the studs hj, whose initial contact is very forcible.

These machines are necessarily subjected to very hard usage. The seasonof their usefulness is limited to but a few days, and it is necessarythat they be put into the harvest-field and driven to their utmostcapacity throughout the entire season. Any accident to the machineresults in great loss to the user by reason of the loss of time inmaking repairs, unless the mechanism is so c011- structed that repairscan be instantly made.

To overcome the difficulties of the initial adjustment of the parts inquestion, as hereinbefore set forth, due to the inaccuracies ofconstruction, and to admit of the quick readjustment of the parts shouldthe wearing of the contact-faces of the studs hj render theminoperative, I make the trip-arm II both longitudinally and laterallyadjustable. This I accomplish by securing it to the shaft (1 by means ofa hub P, fixed to the shaft by any suitable means, as by a rivet p. Thehub I is provided with two lugs Q Q, standing in perpendicular relationeach to the other. The trip-arm II is formed with a longitudinal slot q,adapted to receive the lug Q, and also a bolt R, which passes through asuitable aperture in the lug Q. The lug Q, is apertured to receive abolt S, which passes through a second longitudinal slot q in the arm II,the bolt S carryinga nut s, by which the trip-arm may be locked in thedesired position. A11 adjusting-screw T is set in the rearward end ofthe trip-arm II, extending through to the slot q, so that it may bearagainst the lug Q. A jamnut I, mounted upon the bolt T, serves toeffectually lock this bolt against rotation. A nut 1'', carried upon theend of the bolt R, binds the trip-arm H against the lug Q, and therebyprevents its lateral displacement. The lateral adjustment of the arm IIis accomplished by the use of washers r, a supply of which may becarried upon the outer end of the bolt R under the nut r, and a suitablenumber of which maybe interposed between the lug Q and the trip-arm H.By this means it will be seen that should the clutch-tripping mechanismbecome inoperative by reason of the wear of the contact-faces of thestuds 72, j this wear can be compensated for in a few minutes time bythe readjustment of the trip-arm II.

I mount a roller 3'" 'upon the stud to contact with the clutch-block M.This construction is of advantage when in repairing or ad j usting themachine it becomes necessary to reverse the motion of the packer-shaftA, but its principal advantage is found in the fact that it distributesthe wear incident to the somewhat violent concussion between the pawland the clutch-block when the two parts come into engagement, the rollerbeing rotated slightly incidentally to the impact, so that its entiresurface receives the wear.

The pawl is ordinarily made of comparatively soft metal. The roller 9'mounted upon its stud i is of steel.

I claim as my invention- 1. In a grain-binder, the combination with thebinder mechanism, of a drive-shaft, a spring-clutch for engaging thedrive-shaft with the binder mechanism, a yielding triparm for receivingthe pressure of the forming gavel, a rock-shaft for carrying thetrip-arm, and a longitudinally and laterally adjustable trip-stop fixedto the rock-shaft and being so disposed as to disengage the clutch whilethe gavel is accumulating, and to be thrown out of connection therewithas the trip-arm yields to the pressure of the gavel.

2. In a grain-binder the combination with the binder mechanism, adrive-shaft, a springclutch for connecting the binder mechanism with thedrive-shaft, and a trip for automatically disengaging the clutchandcomprising a rock-shaft, an arm carried by the rockshaft for receivingthe pressure of the forming gavel and a spring to resist such pressure,of an arm for controlling the clutch and having a lateral stud at itsend, and a longitudinally and laterally adjustable trip-arm fixed to therock-shaft and having a lateral stud at its end, said trip-arm being soheld by the shaft while the gavel is forming that its lateral studintercepts the lateral stud of the clutch-controlling arm to disengagethe clutch.

3. In a grain-binder the combination with a drive-shaft, bindermechanism, a clutchblock mounted upon the drive-shaft, and a spring-pawlconnected with the binder mechanism for engaging the clutch-block andhaving a trip-arm extending radially from the center of its rotation, ofa trip-arm for receiving the pressure of the forming gavel, a rock-shaftfor carrying such arm, a hub fixed mally disengage the clutch, mechanismfor yieldingly receiving the pressure of the form- 15 ing gavel, suchgavel-receiving mechanism and the trip-stop being so connected that theyielding of the former disconnects the latter from the clutch.

In testimony whereof I affix my signature 20 in presence of twoWitnesses.

BENJAMIN F. STEWART.

Vitnesses LOUIS K. GILLsoN, SPENCER WARD.

